Removing propshaft from engine coupler - SailNet Community
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post #1 of 28 Old 01-14-2009 Thread Starter
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Removing propshaft from engine coupler

Its 20 degrees outside and I'm removing the rudder and prop shaft on my day off - I must be nuts!

First the reason I need a new prop shaft. The prop shaft corroded between the two retains nuts at the end of the shaft. I discovered this when I tried to remove the end nut and the shaft broke between the nuts with minimal effort - there was very little metal holding it together.

What I have done so far.
Removed the rudder by myself - that was fun.
Removed the set screw that connects the shaft to the coupler.
Loosened the stuffing box.
Sprayed the shaft and coupler with liquid wrench
Tried tapping the base of the prop - does not budge.

I am afraid to give it a good whack because I don't want to destroy the gearbox. I thought of using a torch but I hesitate because the fuel tank is about a foot away.

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Pearson P30
Atomic 4

If you have any tips I would appreciate it.

MB
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post #2 of 28 Old 01-14-2009
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Heat on the coupler and a come-along????
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post #3 of 28 Old 01-14-2009
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Take a look at this link PSS Shaft Seal Installation Photo Gallery by Maine Sailing at pbase.com from fellow SailNetter.
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post #4 of 28 Old 01-14-2009
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You should be able to remove the (4) bolts holding the two halves of the coupler together, then slide the shaft aft. This would give you good access to "operate" on the half of the coupler attached to the shaft.

A gear puller would be good; heat and banging might work, too. At least you'll not be doing any damage to the gearbox this way :-)

Good luck and stay warm.

Bill
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post #5 of 28 Old 01-14-2009 Thread Starter
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JJ
Thanks - you just made my day.
I noticed that your from LI. I sail out of Mt Sinai.
MB
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post #6 of 28 Old 01-14-2009
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Mainesail has a good way

PSS Shaft Seal Installation Photo Gallery by Maine Sailing at pbase.com


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post #7 of 28 Old 01-14-2009
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Quote:
Originally Posted by jjablonowski View Post
Take a look at this link PSS Shaft Seal Installation Photo Gallery by Maine Sailing at pbase.com from fellow SailNetter.
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post #8 of 28 Old 01-14-2009
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With..

With all due respect your shaft is toast so rather than risk damage to the tranny I would advise cutting it out. Couplings usually, and when I say this I mean like 95% of the time, are NOT reusable due to the tolerance lost from breaking the layer of rust free.

More often than not, with old shafts & couplings, you can not separate them. If you need a new shaft any way just cut it out with a 4" angle grinder and a cut off wheel. It will take three minutes max. If this is a split coupling you may get it off but if it is a solid coupling why risk it..

Also here are some warnings:

#1 Never, ever use a slide hammer to remove a prop shaft if it is connected to the tranny. I have seen inexperienced "summer help" shatter a tranny case doing this.. "Look it moved!"

#2 Never bang on the shaft or coupling if it is connected to the tranny. You can damage the bearings and create flat spots! if you must bang on it use a brass, coper or lead hammer..

#3 Always use PB Blaster, Kroil or Thrust!! Liquid Wrench, WD-40 etc. suck at penetrating!!

#4 Never, ever get any penetrating oil on or near your transmissions output shaft seal!!! It will eat it and ruin it requiring a tranny rebuild. Never use the spray feature near any output shaft seals and always dab it on with an artists brush or flux brush instead.


Your shaft is already toast, cut it before doing any potential damage to the tranny!!

Just my .02!

PSS Installation (LINK)

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Last edited by Maine Sail; 01-14-2009 at 11:44 AM.
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post #9 of 28 Old 01-14-2009 Thread Starter
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Thanks to all the members of the sailnet technical support team (do any of you have jobs? ;-). Special thanks to Maine Sail for a great website and the best advice - just cut the shaft. Why didn't I think of that?

Last question - where can I find a prop shaft?
MB
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post #10 of 28 Old 01-14-2009
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Originally Posted by belanich View Post

Last question - where can I find a prop shaft?
MB
Where are you located??

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